The axiallary nerve arises from C5-C6 nerve roots.
It exits the axilla via the quadrangular space with the posterior humeral circumflex artery. wrapping around the surgical neck of the humerus.
- The anterior branch: wraps around the surgical neck of the humerus. It supplies the ant deltoid.
- Posterior branch: supplies the teres minor and posterior deltoid muscle. supplies the lateral shoulder.
The median nerve arises from the C5-T1 nerve roots and the lateral and medial cords of the brachial plexus.
The musculocutaneous nerve arises from C5-C7.
The radial nerve arises from C5-T1 nerve roots. It is formed from the posterior cord of the brachial plexus.
The Ulnar nerve arises from C8+T1 nerve roots and is a continuation of the medial cord of the brachial plexus.
- Muscular branch
- Palmar cutaneous
- Dorsal cutaneous
- Superficial – Plamar 1.5 fingers
- Deep branch – intrinsic muscles
It arises from the L4-S3 nerve roots and lumbosacral plexus.
- Adductor magnus (tibial)
- Long head of biceps femoris (tibial)
- Short head of biceps femoris (common peroneal component)
- Semitendinous + semimembraneous
The obtruator nerve arises from the L2-L4 nerve roots
Arises from L2-L4 nerve roots.